Citrix Systems 6 Manuale Utente

45

/opt/QLogic_Corporation/SANsurferiCLI/iscli -ipdhcp 0

2. Add a persistent iSCSI target to port 0 of the HBA.

/opt/QLogic_Corporation/SANsurferiCLI/iscli -pa 0 

<iscsi_target_ip_address>

3. Use the xe sr-probe command to force a rescan of the HBA controller and display available LUNs. See 

 and 

 for more details.

This step is not required. Citrix recommends that only power users perform this process if it
is necessary.

Each HBA-based LUN has a corresponding global device path entry under 

/dev/disk/by-scsibus

 in the

format <SCSIid>-<adapter>:<bus>:<target>:<lun> and a standard device path under 

/dev

. To remove the device

entries for LUNs no longer in use as SRs use the following steps:

1. Use sr-forget or sr-destroy as appropriate to remove the SR from the XenServer host database. See 

 for details.

2. Remove the zoning configuration within the SAN for the desired LUN to the desired host.
3. Use the sr-probe command to determine the ADAPTER, BUS, TARGET, and LUN values corresponding to the

LUN to be removed. See 

 for details.

4. Remove the device entries with the following command:

echo "1" > /sys/class/scsi_device/

<adapter>

:

<bus>

:

<target>

:

<lun>

/device/delete

Make absolutely sure you are certain which LUN you are removing. Accidentally removing
a  LUN  required  for  host  operation,  such  as  the  boot  or  root  device,  will  render  the  host
unusable.

The LVM over iSCSI type represents disks as Logical Volumes within a Volume Group created on an iSCSI LUN.

Device-config parameters for lvmoiscsi SRs:

target

the IP address or hostname of the iSCSI filer that hosts the SR

yes

targetIQN

the IQN target address of iSCSI filer that hosts the SR

yes

SCSIid

the SCSI bus ID of the destination LUN

yes

chapuser

the username to be used for CHAP authentication

no

chappassword

the password to be used for CHAP authentication

no